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Water Efficiency In The Home. Judy Adler, P.E. Pollution Prevention Assistance Division. Total = 72.5 gallons per capita per day. Typical Single Family Home Water Use Without Conservation. Typical Single Family Home Water Use With Conservation. Total = 49.6 gallons per capita per day.

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water efficiency in the home

Water Efficiency In The Home

Judy Adler, P.E.

Pollution Prevention Assistance Division

slide3

Typical Single Family Home Water Use With Conservation

Total = 49.6 gallons per capita per day

what factors affect water usage in the home
What factors affect water usage in the home?
  • Plumbing Fixtures
  • Household income
  • Cost of water & wastewater service
  • Occupancy rates
  • Age and Lifestyle of residents
  • Climate
  • Local Landscape
  • Water Habits
  • Awareness of the need to conserve water
energy policy act 1992
Energy Policy Act 1992
  • Effective January 1, 1994
  • Water efficiency plumbing standards

Toilets 1.6 gpf

Urinals 1.0 gpf

Showerheads 2.5 gpm @ 80 psi

Faucets 2.5 gpm @ 80 psi

  • 81 MGD water savings in ACF by 2010
economic analysis for my best friend s toilet
Economic analysis for my best friend’s toilet
  • Existing toilet = 5 gpf
  • Average 10 flushes per day
  • New toilet = 1.6 gpf (about $200 including installation)
  • Water savings = 12,410 gal/yr = 16.6 ccf
  • Cost savings @ $5/ccf = $83/year

Payback =2.4 years

slide7

Economic analysis for my toilet

  • Existing toilet = 3.5 gpf
  • Average 10 flushes per day
  • New toilet = 1.6 gpf (about $200 including installation)
  • Water savings = 6,935 gal/yr = 9.3 ccf
  • Cost savings @ $5/ccf = $47/year

Payback =4.3 years

slide8

More toilet talk………………..

An average of 20% of toilets leak

Toilet retrofits

  • displacement devices (saves 0.8 gpf)
  • early closing flappers (saves up to 50% per flush)
  • Toilet dams (saves 0.5 gpf)
  • Valve retrofit kits for flushometers (1.0 gpf)
slide9

More toilet talk………………..

Consumer Reports

High Rated Toilets - October 2002

  • BriggsVacuity 4200 vacuum-assisted toilet - $220
  • Gerber Ultra Flushpressure-assisted toilet - $280
  • TotoCarlyle gravity toilet - $460
  • KohlerWellworth gravity toilet - $150
  • American StandardCadet gravity toilet - $170
urinals
Urinals
  • New 1.0 gpf Urinals (compared to 1.5 to 5.0 gpf)
  • Waterless urinals
  • Flush-valve replacement kit (saves 1.0 gpf)
  • New 2.2/2.5 gpm showerheads save 35-50% of water use compared to older fixtures
  • Inexpensive (payback typically < 1.0 year)

Showerheads

faucets
Faucets
  • Low-flow aerators
  • Metered valves
  • Sensor-activated faucets
  • Leak repair
  • Point-of-use hot water demand units
slide13

Dishwashers

  • New dishwashers use about 7.0 gallons of water per load
  • Older dishwashers use up to 14 gallons per load

Consumer Reports - August 2002

High rated and moderately priced dishwashers

  • Kenmore (Sears) 1563(2) and 1552(2) $350-$450
  • GE Triton XL GSD6600G $499
clothes washers
Clothes Washers
  • High efficiency clothes washers use about 27 gallons of water per load vs. 56 gallons per load for standard top loaders
  • High efficiency clothes washers use 40 – 70 % less energy

Consumer Reports – July 2002

Highest ranking – Kenmore Elite 4292 $1,450

High ranking and lower price – Kenmore 4204, Frigidaire Gallery, and GE Profile $750

behavioral indoor measures
Behavioral Indoor Measures
  • Take a quick shower (save 20 gallons)
  • Collect water from faucet while you wait for hot water and use it to water plants
  • Compost food scraps instead of using garbage disposal
slide16

Behavioral Indoor Measures

  • Don’t pre-rinse dishes except in cases of sticky food
  • Only run dishwasher and washing machine with full loads
  • Use short cycles on dishwasher and washing machine
  • If it’s yellow, let it mellow…..
indoor conservation incentives
Indoor conservation incentives
  • Rebates for toilets, showerheads, washing machines
  • Free water conservation kits
  • Free audits and/or installation of low-flow devices
  • Retrofit on resale ordinances
  • Education Education!
success story santa monica california
Success StorySanta Monica, California
  • Retrofit Upon Resale Ordinance requires installation of water-saving plumbing devices whenever any residential or commercial property is sold or transferred
  • $75 rebate for 1.6 gpf toilets
  • Water use surveys provide free indoor kits
  • Cost of program = $5.4 million
  • Cost savings of $9.5 million from avoided purchases of imported water and avoided wastewater treatment plant capacity
success story massachusetts water resources authority mwra
Success StoryMassachusetts Water Resources Authority (MWRA)
  • Operation Watersense
  • Direct installation of water-saving devices
  • 58% participation rate
  • Installed low-flow fixtures in 348,871 households
  • MWRA’s water conservation program saved $1.4 – 1.9 million* in deferred water supply and treatment plant capacity

*Includes savings from other conservation programs including leak detection and repair, education, improved metering, and rate structures

indoor conservation challenges
Indoor Conservation Challenges
  • Low and declining water rates
  • Previous experience with poor products
  • Consumer apathy & ignorance
  • Rumors